摘要
针对动态计量中加速度计动态特性计量的问题,本文主要论述了基于绝对法冲击校准的加速度计动态计量.依据加速度计物理结构,采用一个二阶微分方程来描述其输入输出特性,并将该方程转化为一种特定的形式,然后利用绝对法冲击校准加速度计的数据,采用一种新的方法在频域确定了方程的未知系数从而得到了加速度计动态特性参数.最后采用激光绝对法振动校准对加速度计进行了校准试验,并将得到的复灵敏度结果与模型的频率响应进行了比较,一致性的结果证明了该方法的有效性.
The primary calibration of dynamic characteristics for accelerometers is discussed in the paper. Based on the physical structure, the input-output behavior of the accelerometer is described in terms of a second-order dynamic model, and then transferred to a certain form. The unknown parameters are estimated by using the frequency domain least-squares method based on the primary shock calibration data. The derived model is then used to determine the frequency response of the accelerometer and compared with the complex sensitivity calibrated by the primary vibration calibration method. The consistent results are obtained by the two methods, which confirm the validity of the proposed modeling approach.
出处
《测试技术学报》
2013年第1期19-24,共6页
Journal of Test and Measurement Technology
基金
国家质检总局质量安全与量值传递专项项目(22-ALC1201)
关键词
计量学
动态计量
冲击激励
加速度计校准
参数辨识
metrology
dynamic calibration
shock excitation
accelerometer calibration
parameters identification
